GX610 ・ GX620 ・ GX670 Maintenance Information
REGULAR SERVICE PERIOD (3)
Perform at every indicated month or operating
hour interval, whichever comes first.
Each Use
ITEM
Engine oil
A
Engine oil filter
C
Air cleaner
D
Spark plug
Spark arrester
(applicable types)
Idle speed
Valve clearance
Combustion chamber
B
E
H
I
Every
Year
or
300 Hrs.
●
G
Check-adjust
Check-adjust
Clean
Check
Replace
Clean
Check
OIL FILLER CAP
Every 200 Hrs.
●
● (1)
●＊
●
●
● (2)
● (2)
●
SEAL
OIL FILTER
OIL FILTER SOCKET
22 N·m (2.2 kgf·m, 16 lbf·ft)
Clean the filter mounting base, and coat the seal of
the new oil filter with clean engine oil. Screw on the
new oil filter by hand until the seal contacts the filter
mounting base, then use an oil filter socket tool to
tighten the filter an additional 7/8 turn.
MUFFLER
SPARK ARRESTER
HIGH-MOUNT MUFFLER
TYPE:
SPECIAL SCREW (4)
SIDE-MOUNT MUFFLER
TYPE:
BRUSH
SPARK ARRESTER SCREEN
GX610/620:
GX670:
THROTTLE
STOP SCREW
Idle speed:
1,400 ± 150 rpm
・On some applications the engine speed is fixed
and does not idle.
・The standard idle speed may be different
depending on the application. Refer to the
equipment manufacturer's instructions for
specific idle speed setting.
B
Oil Change:
Drain the used oil
when the engine is
warm. Warm oil drains
quickly and
completely.
With the engine in a
level position, fill with
the recommended oil
to the upper limit mark
on the oil level
dipstick.
Standard Type:
FOAM
AIR
FILTER
ELEMENT
C
6 mm FLANGE
BOLT (3)
SPECIAL
SCREW
F
● (2)
Oil Level Check:
Start the engine
and let it idle for
1 or 2 minutes.
Stop the engine
and wait for 2 or 3
DRAIN BOLT
minutes (GX670 only).
Remove the oil level
CONTAINER
LOWER LIMIT
dipstick and wipe it clean.
Fully insert the oil level dipstick, then remove it to check the oil level.
If the oil level is low, remove the oil filler cap, and fill with the
recommended oil to the upper limit mark on the oil level dipstick.
D
G
After every 500 Hrs. (2)
SEALING WASHER
(REPLACE)
UPPER LIMIT
D
C
0.7 - 0.8 mm
(0.028 - 0.031 in)
Measure the spark plug
electrode gaps with a
wire-type feeler gauge.
Correct the gap, if
necessary, by carefully
bending the side
electrode.
Recommended spark plug:
ZGR5A (NGK)
J16CR-U (DENSO)
●
L
Every year (2)
Fuel tank
Every
2
years
(Replace if necessary) (2)
K
Fuel tube
＊ Replace the paper air filter element only.
(1) Service more frequently when used in dusty areas.
(2) These items should be serviced by your Honda servicing dealer, unless you have the proper tools and are mechanically proficient.
Refer to the Honda shop manual for service procedures.
(3) For commercial use, log hours of operation to determine proper maintenance intervals.
(4) In Europe and other countries where the machinery directive 2006/42/EC is enforced, this cleaning should be done by your servicing dealer.
A
E
● (4)
Clean
K
Fuel filter
Every
6 Months
or
100 Hrs.
●
Check level
Change
Replace
Check
Clean
Replace
Check-adjust
Replace
F
J
Every
3 Months
or
50 Hrs.
First
Month
or
20 Hrs.
I
Valve clearance: 0.15 mm ± 0.02 mm (IN)
(cold)
0.20 mm ± 0.02 mm (EX)
J
No. 1
CYLINDER
MARK
No. 2
CYLINDER
MARK
Recommended oil: SAE 10W-30
API Service Classification: SJ or later
Engine oil capacity: 1.1 ℓ (1.2 US qt)
(With oil filter replacement: 1.4 ℓ <1.5 US qt>)
AIR CLEANER
CASE
PAPER AIR
FILTER ELEMENT
K
K
GX610/620:
270°
Rotate the crankshaft 270° to put the No.2
cylinder at top dead center of its compression
stroke, and then check intake and exhaust valve
clearance for that cylinder.
FEELER GAUGE
AIR
CLEANER
COVER
PAPER AIR
FILTER
ELEMENT
AIR CLEANER
CASE
ROCKER ARM
PIVOT
Rotate the flywheel until the "T" mark on the
cooling fan aligns with the "T" mark on the right
side of the fan cover. (This alignment point is
the top dead center of the No. 1 cylinder.)
Be sure that the No.1 cylinder is at top dead
center of its compression stroke.
Check intake and exhaust valve clearance for
the No.1 cylinder by inserting a feeler gauge
between the valve stem and the valve rocker
arm.
AMBIENT TEMPERATURE
Snorkel Type:
AIR CLEANER
COVER
PIVOT ADJUSTING
NUT
H
GX670:
L
FUEL TANK
(EQUIPPED TYPES)
WING NUTS
Foam air filter element: Clean in warm soapy water, rinse, and allow to dry thoroughly. Or clean in
non-flammable solvent and allow to dry. Do not put oil on the foam element.
Paper air filter element: Tap the filter element several times on a hard surface to remove dirt, or blow
compressed air (not exceeding 207 kPa <2.1 kgf/cm ², 30 psi>) through the filter element from the air
cleaner case side (standard type) or from the inside (snorkel type). Never try to brush off dirt; brushing
will force dirt into the fibers. Replace the paper element if it is excessively dirty.
FUEL FILTER
・Check the fuel filter for water accumulation or sediment.
If water or sediment is found, replace the fuel filter.
・Check the fuel lines for deterioration, cracks or signs of
leakage and replace if necessary.
Clean the fuel tank with non-flammable
solvent, and allow the fuel tank to dry
thoroughly.
© Honda Motor Co., Ltd. 2010
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